Canon EF 100-400mm f/4.5-5.6L IS II USM Lens Description

One fluorite and one super UD lens element provides excellent correction of chromatic aberration throughout the entire zoom range, helping to deliver high-quality images with high resolution and contrast.

Optical Image Stabilizer provides up to four shutter speed steps of correction. --According to CIPA standards (400mm focal length, when using the EOS-1D X).